Getting ready for midterms...

The answer key for the practice problems is posted on Its Learning.
You can also find a video playlist of the problems here.

Don't forget to turn in your work on the practice problems tomorrow and get some extra credit on the midterm.

HW Monday, 1-13

D & F periods
Solve for the member forces on the truss below (the same one we did in class)

• isolate one joint at a time.
• draw an FBD for that joint
• Use trig to break member forces into x and y components
• ADx = ADcos()
• ADy = ADsin()
• set up equilibrium equations to solve for member forces
• Repeat until you solve for all member forces (hint: start at joints that have the least number of forces)

Knowns

• Ray = 66 2/3 lb;  Rby = 33 1/3 lb;  Rax = 0
• Fdy = -100 lb
• AC = 3', BC = 6', CD = 4'

How do I do this again? - http://youtu.be/cOSv5V9ShOs

HW Tuesday, 1-7

F period
Complete/fix 2.1.6 and 2.1.8.

D period
On #4 on activity 2.1.8, Solve for the reaction forces using the values below.

HW Monday 1-6

Add the following values to number 4 of activity 2.1.8.

Solve for the the reaction forces, Rcx, Rcy, and Ray

HW Thursday, 1-2

D & F Periods

• Activity 2.1.6 Reaction Forces (due Monday)
• Videos & Examples can be found on Its Learning on the next page of the Statics Lessons